Vocab 1
A sudden movement of earth's crust is a
Earthquake
underwater earthquakes with a magnitude of what or greater causes a tsunami
6.5
to pinpoint an earthquakes location you need information from how many siesmometers?
3
A crack in the earth's crust is a
fault
A large ocean wave caused by an underwater earthquake is a
tsunami
Scientist use what to detect and measure earthquakes waves
seismometer
what waves do the most damage?
surface
A measure of the energy that an earthquake releases is it's
magnitude
Waves of energy spread out from the
focus
what scale measures only what people feel?
Mercalli
the fastest waves are
primary
The point on the surface directly above an earthquakes focus is it's
epicenter
the place along a fault where the slipping that causes an earthquake to begin is the earthquakes
focus
The scale that measures the magnitude of an earthquake is called the what scale?
Richter
these waves are only half as fast of the primary waves
secondary